Speed-changing device for spinning-machine.



F. H. MoDE VITT & A. WALTON.

SPEED CHANGING DBVIOE POR SPINNING MACHINES. APPLICATION FILED AUG. 5, 190a. RENEWED SEPT. 30, 1909.

941,645. Patented Nov. 30, 1909.

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v i UNITE STATES PATENT OFFICE. a

FREDERICK H. McDEVITT, OF EASTHAMPTON, MASSACHUSETTS, AND ALBERT WALTON,

OF CHARLOTTE, NORTH CAROLINA, ASSIGNORS OF ONE-THIRD TO GEORGE A. AYER,

OF EASTHAMPTON, MASSACHUSETTS.

- SPEED-CHANGING DEVICE FOR SPINNING-MACHINES.

Specification of Letters Patent;

Patented Nov. 30, 1909.

Application filed August 5, 1908, Serial No. 447,085. Renewed September 30,1909. Serial No. 520,878.

' To all whom it may concern:

Be it known that we, FREDERICK H. Mo- Dnvrrr, a'citizen of the United States of America, residing at Easthampton, in the county of Hampshire and State of Massachusetts, and ALBERT WALTON, a citizen of the United States of America, residing at Charlotte, in the county of Mecklenburg,

State of North Carolina, have jointly inas determined by the diameter of the bobbin 7 increases as t as it fills up with s un yarn, that is to say it is the diameter 0 the wound yarn which governs whether the yarn be spun onto a bobbin, cop, or spindle.

The object of the invention is to provide meanswhereby when a set is started on the frame, the spindles will have imparted thereto a relativel low speed of rotation which he diameter of the yarn builds up on the spindle, it being a well known fact that the nearer the yarn'runs to the center or axis of the spindle as it passes under the traveler the more liability there is of breakage, this liability decreasin as the diameter of the bobbin increases, an the line of delivery of the yarn moves gradually away from the center.-

The preferred embodiment of the inven" tion'comprises an electric motor which is preferably axially and rigidly connected with the drum-shaft of the spinning or twisting frame, and associated with this motor is a controller, the mechanism of the controller bein actuated by the movements of somepart 0 the spinning frame; preferably, however, by the movement of the ringrail, to the end that the resistance in the controller may be gradually cut out thus providing for a like gradual increase in the increases.

We do not limit ourselves to the rigid and axial connection of the motor-shaft and the drum-shaft but may if desired, use a belt, gear, chain, or rope drive. A

- Heretofore it has been the common practice to vary the s eed of the bobbins by means of a series 0 change gears similar to the back gears of an engine lathe. This change in the speed of the bobbinsis at best only a make-shift, and is not a radual increase in speed as the diameter 0 the bobbin Our invention is designed to overcome this s eed defect and make the change gradual rom start to finish.

In the drawings forming part of this application,'Figure 1 is a detail plan view showing a portion .of the drum-shaft and the motor rigidly connected thereto, also one spindle and the usual driving means between the spindle and the drum-shaft, and further showing the construction of the pawls for operating the controller in a step-b -step' Connected to the shaft 12 is the electric motor 0 by means of the shaft d in any suitable manner.

The usual risin and falling ring-rail is desi nated by the etter e.

f esi ates a crank-arm rigidly connected to the s aft 9, and secured to the shaft 9 is an arm 72. having a slot and pin connection with the rod 7' which is secured to the ringrail 6 as designated at k.

m designates a counterweight rigidly secured to the shaft 9 whereby the ring-rail 6 can be maintained in a balanced condition.

It is understood that the machine is provided throughout its length with a series of balancing means for the ring-rail 6 although only one is shown in the drawing.

The usual'bobbin spindle or co is designated at 0 and driven from the rum-shaft b in the usual manner, as by means of the belt p. The bobbin spindles or cops are mounted on the usual fixed rail g.

9 designates a rod connected to the arm f, (as shown in Fig. 2) by means of the pin .9 which engages a V-shaped notch t in the end of the rod r, the notch and pin being held yieldingly together by means of the spring a, the purpose of this connection being to prevent breakage should any obstruction to the movement of rod r occur.

The shaft 9 is suitably supported on the fixed rail 9 by means of the depending bracket 41, and the controller-box w is suitably located with relation to the rod 1- and motor 0.

Mounted on the upper end of the controller-box w is a ratchet-wheel 00 that is rigidly secured to a shaft y which extends into the box w, and to which the usual contact fingers are attached that engage the resistance coils located therein, whereby the amount of current that may be allowed to operate the motor may be controlled. The details of the controller itself however, form no part of the invention.

The electrical connections between the m0- tor and controller are indicated by 2.

Pivotally mounted in the outer end of the rod 7* is a pawl 3 that is normally drawn toward the ratchet-wheel as by means of the spring 4:.

5 designates a bracket secured to the framework a of the spinning machine and in which is pivotally mounted the lever 6, one end of the same bein slotted at 7 and engaging a pin in the r0 1, as shown at 8, the opposite end of the lever carrying a trailing pawl 9 that is normally held toward the teeth of the wheel w for the purpose of pre venting backward movement thereof.

By means of the extension 1" of the rod 1', a reciprocating motion is imparted thereto in the usual manner, which reciprocating motion serves to raise and lower the ringrail 0 whereby the spun material is coiled or wound onto the bobbin 0 in the usual manner. At the same time, and in unison with the reciprocating movements of the ring-rail a, the rod 1" acts, by means of the pawl 3, to rotate the ratchet-wheel m in a step-by-step manner whereby the resistance is gradually cut out thus causing the speed of the motor to gradually increase, which increase in speed is determined by the increase in the diameter of the spindle or bobbin as the same builds up, thus permitting the formation of a spool that is much more compact and uniform than by the method heretofore used for varying the speed or rate of rotation of the spindle, which method has usually consisted in the employment of a change of gears for varying the speed of the drumshaft, as stated.

The employment of the pin a and notch t permits the rod 7* to become readily disengaged from the crank-arm f should any obstruction occur, as the ratchet-wheel refusing to operate, or when the traveling contact fingers on the shaft y have reached the end of their travel, thus preventing breakage.

It is not intended to limit the invention to the employment of any special kind of elec tric motor, as alternating or direct current may be employed, and either a single or polyphase motor may be employed, and the speed thereof may be controlled by any of the methods known in electrical .practice as field control or by resistance in the armature or secondary. The field control system is, however, preferred. The controller may also be operated by hand independent of the action of the machine, if desired. The speeds may be increased or decreased according to I the needs of the core as uniform from start to finish, or irregular, or they may continue for only a portion of the cycle running at constant speed the rest of the time.

What we claim, is

1. As an improvement in means for varying the rate of rotation of the drum-shaft of a spinning machine in proportion as the diameter of the bobbin increases or builds up in diameter during the winding process, said means including a suitable electric motor directly connected to the drum-shaft, a controller-box for varying the fiow of current to said motor, and connecting means between thering-rail of the spinning machine for operating the controller.

2. In combination with the drum-shaft of a spinning machine, an electric motor connected to said shaft, an electric current controller for said motor, and ratchet means on the controller for operating said controller from the ring-rail of the spinning machine,-

whereby the speed of the motor may be varied as the diameter of the bobbin increases or builds up.

3. In combination wit-h the drum-shaft and ring-rail of a spinning machine, an electric motor for driving said shaft, a controller for varying the flow of current in said motor, a rod operable from the ring-rail of the machine and provided with means for operating said controller, said means including a pawl and ratchet mechanism, whereby as the spindle or bobbin increases in diameter the speed of rotation of said spindle will increase in direct proportion thereto.

4. A spinning machine provided with an electric motor for driving the drum-shaft of said machine, a controller for the motor for cutting out resistance in the motor circuit,

and means for operating the controller from a. moving part of the machine as the diameter ol the cop builds up, whereby the speed of the motor may be Varied, as described.

.3. In combination with the drun'i-shaft of a spinning n'lachine, an electric motor conllttittl thereto, a controller box for varying the resistance in the motor circuit, said box being provided with a ratchet-Wheel, a rod having a pawl foroperating the'ratchet, said rod and pawl laiing" yieldingly connected to the ring-rail of the machine whereby the speed of the motor may be varied as the cop or bobbin increases in diameter. and whereby the rod may be detached from the ring-rail 15 when an undue strain is placed thereon, as described.

FREDERICK H. LIGDICVIPF. ALBERT WALTON.

Witnesses to F. H. McDevitt:

CLINTON A. PUTNAM, \VmsLow H. EDWARDS. lVitnesses to Albert \Valton:

E. G. TEnNoN, GEO. W. KING. 

